function pickingNumbers(a) {
    let longestSubarrayLen = 0
    let i = 0;
    
    while (i < a.length) {
        let arr = [a[i]];
        const visitedIndexes = [];
        let j = i+1;
        
        while (j < a.length) {
            const current = a[j];
            const last = arr[arr.length-1]
            const prev = arr.length > 1 ? arr[arr.length - 2] : undefined;
            if (Math.abs(current - last) <=1 && !visitedIndexes.includes(j)) {
                arr.push(a[j]);
                visitedIndexes.push(j);
                if (longestSubarrayLen < arr.length) {
                    longestSubarrayLen = arr.length
                    console.log({arr})
                }
            } else if (prev && j === a.length - 1) {
                j = visitedIndexes[visitedIndexes.length - 2] || i+1;
                arr.pop();
            }
            j++
        }
        i++;
    }
    
    return longestSubarrayLen;
}